Do you have a PWA reference to back your claim? I have picked up trips from the swap board / open time while out sick and have always gotten paid for them if I couldn't end up flying them.
23 P.5.i. is the reference. It has long been interpreted to mean that if you picked up a WS and then later got sick for it, you would get paid, but if you were already out sick or knew when you picked up the white slip that you would not be flying it due to sick leave (surgery scheduled as an example), it will not get paid. Sometimes people get away with it because there is no automation to prevent it, but if you are out sick and white slip additional time that you have no intention of flying just to pad your pay, that is technically not compliant with our contract and the company would be within their rights to remove the pay for that trip(s).
There is no such language under the contract section for the Swap Board.